updated for version 7.4.284
Problem:    Setting 'langmap' in the modeline can cause trouble.  E.g. mapping
	    ":" breaks many commands. (Jens-Wolfhard Schicke-Uffmann)
Solution:   Disallow setting 'langmap' from the modeline.
Added tag v7-4-284 for changeset 3c35ca9666e8
updated for version 7.4.285
Problem:    When 'relativenumber' is set and deleting lines or undoing that,
	    line numbers are not always updated. (Robert Arkwright)
Solution:   (Christian Brabandt)
Added tag v7-4-285 for changeset 5cb1828fd005